Automatic antiholdup door control



SLO, M232. D. SEITZMAN AUTOMATIC ANTIHOLDUP DOOR CONTROL Filed Dec. 11, 1931 Patented Aug. 30, 1932 ATT FFEQE y DAVID SITZMAN, OVF'NEW YORK, N. Y.

AUTOMATIC ANTII-IOLD'UP DOOR CONTROL Application filed December 11, 1931. Serial No. 580,313.

This invention relates to new and useful improvements in an automatic anti-holdup door.

The invention has for an object the construction of a device of the class mentioned which is characterized by the provision of door sections having adjacent edges at an inclination to the vertical. toy cause the sections to respectively move up and down when the 10 doors are 'shut or whensome article is placed` therebetween.

As a still further object of this invention it is proposed to provide means for latching the. door sections in closed position upon up- 1 l5 ward and downward motion respectively.

The invention has for a still further object the arrangement of a compartment enclosed by a pairrof doors constructed and set forth so as to entrap holdup men between them. 20 It is a still further obj ect of this invention to be ableto operate either one of the pair of.y

construction of a device of the class described which is of simple, ydurable constructiom'dependable in use and efficient in operation, and which can be manufactured and sold at a reasonable cost.

For further comprehension of the invenf tion and of the objects and advantages thereof,V reference will be had to the following description and accompanying drawing, and to the appended claims in which the various nov-el features of the invention are more particularly set forth.

' In the accompanying drawing forming a Vmaterial part of this disclosure Fig. 1 is a perspective view of a door frame with an automatic anti-holdup door constructed according to this invention. i

Fig. 2 is a fragmentary horizontal sectionf may be provided for producing an oral sigal view taken on the line 2-2`of Fig. 1.

Fig. 3 is a fragmentary vertical sectional view'taken on the line 3-8 of Fig. 1.

Fig. 4 is a fragmentary vertical sectional view taken on the line 1re-a of Fig. 1.

Fig. 5 is a fragmentary vertical sectional view taken on the line 5-'5 of Fig. 1.

Fig. 6 is a fragmentary vertical sectional view taken on the line 6 6 of Fig. 1.

Fig. 7 is a fragmentary vertical sectional viewtalien on the line 7 7 of Fig. 11.

Fig. 8 is a view similar to a portion of F ig. 1 but illustrating a modified arrangement.

The reference numeral 10 indicates a door frame in which there is a front wall 11 and a rear wall 12. In each of these walls there is mounted door sections 13 and 14 composing a door. These door sections are disposed in a vertical plane and mounted for horizontal sliding. They are resiliently supported at the tops and bottoms and have their adjacent edges 15 inclined to the vertical'at an angle so as to cause one section to move up and the other down when the 'door is closed or when some object is clamped 'between the door. A lock 16 is mounted upon one of the door sections and is engageable with a keeper 17 on the other door section to lock the doors closed until it is Opened from the outside with a key.

One of the door sections may be provided with a drawer 18. This drawer, as shown in Fig. 3, has its front and rear faces flush with the front and rear faces of the door section. Pegs 19 project from the sides of the drawer into recesses 20 formed in the door section so as to limit retraction and extension of the drawer. A spring 21 acts between the door section and the drawer to normally urge it closed. The drawer has its inner side slightly cut away, as indicated byV numeral 227 and a portion of the door section is recessed7 indicated by reference numeral 23, so as to allow a burglar entrapped behind the door to deposit his weapons within the drawer to surrender to guards outside.

The pair of door sections 13 and 14. may slide in any suitable channel or guide in a horizontal direction.

Suitable electrical or mechanical device lUU nal when the door sections are operating'.

A means is provided foropening and closing the ydoor sections. This means 1s shown toV comprise a rod 24 vertically through each of the door sections so that the door sections may slide Vup and down thereon and rod 1 extending throughielongated slots 25 at the top and bottomof the door frame. Levers 26 are pivotally connected at one'of their `r u yends Vupon the rods' 24 and 'atj'th other ends,

27 are pivotally connected upona stationary l member. Intermediately, these-levers .con-

nect ywith rods 28'movable by members 29. AThe details of the members=29` are lnot shown m', since'they jform no `part of this invent-ion.

They may rbepneumaticfcylinders, vsolenoids,

y @orthe like; l Similarfconstructionsare'gen- `erallylin/own' inthe art.

Themea-ns! for res'il'iently supporting the ,formed withinthedoor frame. .A V.rack of teeth 3,3 is attached on eachvr ofthe door sections and is engageable witha complemen- ,30 tary rack of; teeth 34 attached-upon thedoor frame. VMore particularly,'the ,door section A13 has the racks 33 and 34atthe'to'pfwhile springs or yracllrs vas described relative'to 'the f fthe door section7 14 has these racks atpthe bottom. Consequently, whenV the door secj .clmed sides 15 they are vcaused to y,move correspondingly up and downl andvthus lock,v

tions are m'ovedtogether"because of the ininV position. The bottom v`edge lof the ydoor section 13 and the top edge of thedoor sec-T tion 14 is disposed merely. lwithin a recess' 35. There is no provision of shoulders,

other edges.

y Fig. V8, a modifiedl arrangement .ot-thevk invention hasH beendisclosedin whichthe K. door iscomposedoi'more ythan two door sections.v More particularly,V these sections :are indicated'by reference numerals 13,514 and a central section 36. The central section V hasits opposite sides parallelto each other andis merelyslidable within the frame. The 'end sections 13vand 14 are constructed 'simi ilar tothe sections having corresponding nu meralsinthefpreierred form. Locks 16 are 'shown' on` the end sections engageablewith keepers 17 on the centersection.y The center section is also shown equipped with the doorN The operation of thefdevice consists in causing .the door sections'toVY close in an attempt to entrap vthe robber, holdup YmanorV burglar between the walls 11 and 12,. Should the person attempt tostop the closing or" the ydoors by inserting his'foot or any other obi V)ect betweenthe door sections before they are completely closed, the inclined edges 15 cause the door sections to respectively raise and lower and latch them-*against opening. If no obstaclesl are placed between the door ,y

sections, they will completely close and autolInatically assume raised andlowered positions. Whenthe form used in Fig. 8 is in operation, the central section a 36l does not move'upf orl down butjust' in end sections.

The door operating mechanism may be controlled by push buttons or similar means lo- Y cated-.at variousstrategic points.

While lkhave shown and described'the preer'red embodiment of my invention, it is tov be understood that I do notlimi't myself to lthe preciseconstruction hereindisclose'd andV ythe right is reservedto all changes and-modlcations coming kwithin the scope ofthe 1in-k i vention as defined 'in'theappended-claims.

` Al'lavingfthus described my invention what i claim as new, and .desire yto secure yby lUnited States Letters Patent is rame,ldoor sections horizontally slidable and "resiliently supported and having-'"end-c'onl' lljln an automatic anti-holdupdecida i tacting'edges atan inclinationtov cause one i section to move up and the other'down when the door sections areforcedjtogether or-forced upon some article interposed,l means fore-losing and opening said door sections,stat`onary racks upon said door frame above and 'below said door sections, and tooth members ons'aid door sections engageable withsaid racks Vin the doorfsections pand orced'q'up vand-down respectively.

resiliently supported {and having Yend f 'contacting kedges at an inclination to "causeonel 'section'.to move up and thefother down when 'l the door sections areo-rced together enforced upon. some article interposed, mean sl'or closing and opening said door sect1ons,fst`ation ary racls'upon said doo'rirame above :and

below said door sections, and too-thfmembers c ico 2.7111 an automatic anti-holdupfdoor, a frame, door sectionshorizontally slidab'leand en said door sections engageablewith saidracks in the door sections yand vforced upland p down respectively, said-frame having iront and rearwalls with a latch spaced therebev tween so that a person may enter and be en` l trappedk upon closing of therdoors 'ini'said Y walls.

section'to move up and the `vother downwhen the vdoor sections are orced'together or forced upon some article interposed, means orclosingand opening said door sections, stationary l racksuponfsaid door frame'above andxbelowi *saidv doorsections, tooth. members onsaid doorsectlons engagea'ble with'said'racks'in K the4 door' sections a and `Jforced upV and', fdown 3. yIn 'an automatic',anti-holdup door, a

frame, door sections horizontallyslidable and,` resiliently supported fand lhaving end' con-`r tacting edges at an inclination to cause one respectively, a means i being provided for, i5

latching said sections closed, comprising a lock upon one section engageable with a keeper on the other.

4. In an automatic anti-holdup door, al frame, door sections horizontally slidable andi resiliently supported and having end con tacting edges at an inclination to cause onex section to move up and the other down when: the door sections are forced together or forced upon some article interposed, means for clos ing and opening said door sections, stationary racks upon said door frame above and below said door sections, and tooth members on said door sections engageable with said racks in the door sections and forced up and down respectively, the upper and lower edges of said door sections engaging within recesses formed in the door frame, and springs being attached upon the door sections on the 2'0 edges within the recesses and engaging the door frame for accomplishing the resilient holding of the door sections.

5. In an automatic anti-holdup door, a frame, door sections horizontally slidable and 25 resiliently supported and having end contacting edges at an inclination to cause one section to move up and the other down when the door sections are forced together or forced upon some article interposed, means for clos- 3@ ing and opening said door sections, stationary racks upon said door frame above and below said door sections, and tooth members on said door sections engageable with said racks in the door sections and forced up and down respectively, said door having an idler door section between either door sections and its opposite sides being parallel with each other and at an inclination tothe vertical.

6. In an automatic anti-holdup door, a frame, door sections horizontally slidable and resiliently supported and having end contacting edges at an inclination to cause one sectionto move up and the other down when the door sections are forced together or forced upon some article interposed, means for closing and opening said door sections, stationary racks upon said doorframe above and below said door sections, and tooth members on said door sections engageable with said racks in the door sections and forced up and down respectively, each of said door sections being slidably mounted upon a vertical rod, and said means for opening and closing the door sections being connected withsaid rod. In testimony whereof I have affixed my signature.

DAVID SEITZMAN. 

